| 薛宏程,马倩,彭杏瑶,陈明,刁明军.基于Herschel-Bulkley流变模型的滑坡涌浪数值模拟方法研究[J].水利学报,2023,54(3):268-278 |
| 基于Herschel-Bulkley流变模型的滑坡涌浪数值模拟方法研究 |
| Numerical simulation of landslide generated impulse waves based on Herschel-Bulkley rheological model |
| 投稿时间：2022-10-08 |
| DOI：10.13243/j.cnki.slxb.20220817 |
| 中文关键词: 滑坡涌浪 流变模型 数值模拟 阻力模型 山区水库 |
| 英文关键词: landslide generated impulse waves rheological model numerical simulation resistance model mountain reservoir |
| 基金项目:重庆市教委科学技术研究项目(KJQN201900711);国家自然科学基金青年科学基金项目(52109150) |
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| 中文摘要: |
| 山区水库滑坡涌浪灾害严重威胁库区航运、水工建筑物及沿岸城镇的安全,针对这类次生灾害进行预测和早期防范具有重要意义。滑坡冲击水体形成涌浪的动力过程十分复杂,对其进行准确模拟一直是近年来的研究热点。本文将滑坡视为由流体化物质组成的一类连续的特殊流体,在满足连续方程和动量方程的基础上,引入Realizable k-ε紊流模型和VOF模型,采用自定义函数程序控制滑坡流变特征和底部摩擦阻力,利用有限体积法模拟了Lituya海湾滑坡涌浪运动的全过程,数值模拟得到的涌浪生成形态、速度矢量场与试验结果吻合较好。通过对库区滑坡涌浪开展三维数值模拟,定量获得了不同时刻下库区内涌浪的运动信息。结果表明,涌浪在狭窄顺直河道内传播时波高衰减缓慢,波形类似于孤立波,而在库区弯道地形影响下波幅会迅速衰减。论文研究成果可为科学制定涌浪灾害应急预案和紧急避险方案提供依据。 |
| 英文摘要: |
| Landslide generated impulse waves in mountain reservoirs may cause severe threaten to the safety of navigation,hydraulic structures and people living along the bank.Therefore,it is of great importance to predict and prevent such secondary disasters.However,the dynamic process of landslide surge is very complex.Accurate simulation of it has been a top research topic recently.In this paper,the landslide is regarded as a kind of continuous fluid composed of fluid materials.On the basis of meeting the continuity equation and momentum equation,Realizable k-ε turbulence model and VOF model are applied.Rheological characteristics and bottom friction resistance of landslide mass is compiled with user-defined functions.The finite volume method was used to simulate the whole process of landslide surge movement in Lituya Bay,and the simulated results of the generated form of the waves and the velocity vector field were in good agreement with the test results.Based on this,a 3-D model was developed to simulate the movement of landslide generated impulse wave in a reservoir.Quantitatively time variations of the landside generated impulse waves were obtained.The results show that the wave height decays slowly in a narrow straight river channel,and the wave shape is similar to solitary wave.However,the wave amplitude will be rapidly attenuated under the influence of the curved terrain in the reservoir.This simulation method can provide a basis for making the surge disaster emergency plan and evacuation plan. |
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